Packaging stacker



FIG. 1 is a view from the above to the front and to the left of the packaging stacker which is the subject of my new design.

FIG. 2 is a front elevational view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is an enlarged left side elevational view thereof; and,

FIG. 6 is an enlarged right side elevational view thereof.

The broken lines in FIGS. 5 and 6 depict environmental subject matter only and form no part of the claimed design. 

CLAIM The ornamental design for a packaging stacker, as shown and described. 